* { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Inter', sans-serif; background: #ffffff; color: #1a3a2a; overflow-x: hidden; }
        
        :root {
            --primary: #2d8c4e;
            --primary-dark: #1a5f3a;
            --primary-light: #4caf6e;
            --gray-light: #f8faf8;
            --gray-mid: #e8f0eb;
            --text-dark: #1a3a2a;
            --text-muted: #4a7c5e;
            --shadow-sm: 0 4px 12px rgba(0,0,0,0.05);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 20px 35px -10px rgba(0,0,0,0.1);
        }
        
        .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
        
        /* 导航栏 */
        .navbar { background: white; box-shadow: var(--shadow-sm); position: sticky; top: 0; z-index: 1000; padding: 16px 0; }
        .nav-container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
        .logo h1 { font-size: 1.7rem; font-weight: 800; background: linear-gradient(135deg, var(--primary-dark), var(--primary)); -webkit-background-clip: text; background-clip: text; color: transparent; }
        .nav-right { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
        .nav-links { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; }
        .nav-links a { text-decoration: none; font-weight: 500; color: var(--text-dark); transition: color 0.2s; font-size: 0.95rem; }
        .nav-links a:hover, .nav-links a.active { color: var(--primary); }
        
        .dropdown { position: relative; }
        .dropdown-toggle { display: flex; align-items: center; gap: 6px; cursor: pointer; }
        .dropdown-menu { position: absolute; top: 100%; left: 0; background: white; min-width: 180px; border-radius: 16px; box-shadow: var(--shadow-md); padding: 12px 0; opacity: 0; visibility: hidden; transform: translateY(-10px); transition: all 0.2s; z-index: 1001; border: 1px solid var(--gray-mid); }
        .dropdown:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(8px); }
        .dropdown-menu a { display: block; padding: 10px 20px; color: var(--text-dark); text-decoration: none; font-size: 0.85rem; }
        .dropdown-menu a:hover { background: var(--gray-light); color: var(--primary); }
        
        .lang-dropdown { position: relative; }
        .lang-toggle { display: flex; align-items: center; gap: 6px; cursor: pointer; padding: 6px 12px; border-radius: 30px; background: var(--gray-light); font-size: 0.85rem; }
        .lang-menu { position: absolute; top: 100%; right: 0; background: white; min-width: 140px; border-radius: 16px; box-shadow: var(--shadow-md); padding: 8px 0; opacity: 0; visibility: hidden; transform: translateY(-10px); transition: all 0.2s; z-index: 1001; border: 1px solid var(--gray-mid); }
        .lang-dropdown:hover .lang-menu { opacity: 1; visibility: visible; transform: translateY(8px); }
        .lang-menu a { display: block; padding: 8px 20px; color: var(--text-dark); text-decoration: none; font-size: 0.85rem; }
        .lang-menu a:hover { background: var(--gray-light); color: var(--primary); }
        .lang-menu a.active { color: var(--primary); font-weight: 600; }
        
        /* 面包屑 */
        .breadcrumb { background: var(--gray-light); padding: 16px 0; margin-bottom: 40px; border-bottom: 1px solid var(--gray-mid); }
        .breadcrumb a { color: var(--text-muted); text-decoration: none; font-size: 0.85rem; }
        .breadcrumb a:hover { color: var(--primary); }
        
        /* Hero区域 */
        .about-hero { background: linear-gradient(135deg, #1a5f3a 0%, #2d8c4e 100%); padding: 60px 0; text-align: center; color: white; }
        .about-hero h1 { font-size: 3rem; font-weight: 700; margin-bottom: 16px; }
        .about-hero p { font-size: 1.1rem; opacity: 0.9; max-width: 700px; margin: 0 auto; }
        
        /* 公司介绍卡片 */
        .about-intro { padding: 80px 0; background: #ffffff; }
        .intro-grid { display: flex; flex-wrap: wrap; gap: 60px; align-items: center; }
        .intro-text { flex: 1.2; }
        .intro-text h2 { font-size: 2rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 24px; position: relative; }
        .intro-text h2::after { content: ''; position: absolute; bottom: -12px; left: 0; width: 60px; height: 3px; background: var(--primary); border-radius: 3px; }
        .intro-text p { color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
        .intro-image { flex: 0.8; border-radius: 24px; overflow: hidden; box-shadow: var(--shadow-lg); }
        .intro-image img { width: 100%; height: auto; display: block; transition: transform 0.3s; }
        .intro-image:hover img { transform: scale(1.02); }
        
        /* 统计卡片 */
        .stats-section { background: var(--gray-light); padding: 60px 0; }
        .stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; text-align: center; }
        .stat-card { background: white; padding: 30px 20px; border-radius: 20px; box-shadow: var(--shadow-sm); transition: transform 0.3s; }
        .stat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
        .stat-number { font-size: 2.5rem; font-weight: 800; color: var(--primary); }
        .stat-label { font-size: 0.9rem; color: var(--text-muted); margin-top: 8px; }
        
        /* 使命愿景价值观 */
        .mvv-section { padding: 80px 0; background: #ffffff; }
        .mvv-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 40px; }
        .mvv-card { text-align: center; padding: 40px 30px; border-radius: 24px; background: white; box-shadow: var(--shadow-sm); border: 1px solid var(--gray-mid); transition: all 0.3s; }
        .mvv-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .mvv-icon { width: 80px; height: 80px; background: rgba(45,140,78,0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 24px; }
        .mvv-icon i { font-size: 2.5rem; color: var(--primary); }
        .mvv-card h3 { font-size: 1.4rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 16px; }
        .mvv-card p { color: var(--text-muted); line-height: 1.6; }
        
        /* 发展历程时间线 */
        .timeline-section { background: var(--gray-light); padding: 80px 0; }
        .section-title { text-align: center; font-size: 2rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 50px; }
        .timeline { position: relative; max-width: 900px; margin: 0 auto; }
        .timeline::before { content: ''; position: absolute; left: 50%; transform: translateX(-50%); width: 2px; height: 100%; background: var(--primary-light); }
        .timeline-item { display: flex; justify-content: space-between; margin-bottom: 40px; position: relative; }
        .timeline-item:nth-child(odd) { flex-direction: row; }
        .timeline-item:nth-child(even) { flex-direction: row-reverse; }
        .timeline-content { width: 45%; background: white; padding: 20px 25px; border-radius: 16px; box-shadow: var(--shadow-sm); border-left: 3px solid var(--primary); }
        .timeline-year { font-size: 1.2rem; font-weight: 800; color: var(--primary); margin-bottom: 8px; }
        .timeline-title { font-size: 1rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 8px; }
        .timeline-desc { font-size: 0.85rem; color: var(--text-muted); }
        .timeline-dot { position: absolute; left: 50%; transform: translateX(-50%); width: 14px; height: 14px; background: var(--primary); border-radius: 50%; border: 3px solid white; box-shadow: 0 0 0 2px var(--primary-light); }
        
        /* 证书展示 */
        .cert-section { padding: 80px 0; background: #ffffff; }
        .cert-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; text-align: center; }
        .cert-item { background: var(--gray-light); padding: 30px 20px; border-radius: 20px; transition: transform 0.3s; }
        .cert-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
        .cert-item img { max-width: 100px; height: auto; margin-bottom: 16px; }
        .cert-item p { font-weight: 600; color: var(--primary-dark); }
        
        /* 工厂展示 */
        .factory-section { background: var(--gray-light); padding: 80px 0; }
        .factory-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
        .factory-card { border-radius: 24px; overflow: hidden; box-shadow: var(--shadow-md); }
        .factory-card img { width: 100%; height: 250px; object-fit: cover; transition: transform 0.3s; }
        .factory-card:hover img { transform: scale(1.02); }
        
        /* CTA区域 */
        .cta-section { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); padding: 60px 0; text-align: center; color: white; }
        .cta-section h2 { font-size: 2rem; margin-bottom: 16px; }
        .cta-section p { opacity: 0.9; margin-bottom: 30px; }
        .cta-btn { background: white; color: var(--primary-dark); padding: 12px 32px; border-radius: 50px; text-decoration: none; font-weight: 600; transition: all 0.3s; display: inline-block; }
        .cta-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
        
        /* 页脚 */
        .footer { background: #0a2f1a; color: #b8d9c4; padding: 48px 0 24px; margin-top: 40px; }
        .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 40px; margin-bottom: 40px; }
        .footer-col h4 { color: white; margin-bottom: 20px; font-size: 1rem; }
        .footer-col p, .footer-col a { color: #b8d9c4; font-size: 0.85rem; line-height: 1.8; text-decoration: none; }
        .footer-col a:hover { color: var(--primary-light); }
        .social-links { display: flex; gap: 12px; margin-top: 16px; }
        .social-icon { width: 36px; height: 36px; background: rgba(255,255,255,0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; transition: all 0.2s; }
        .social-icon:hover { background: var(--primary-light); color: #0a2f1a; }
        .copyright { text-align: center; padding-top: 24px; border-top: 1px solid #2a6a46; font-size: 0.75rem; }
        
        @media (max-width: 768px) {
            .nav-container { flex-direction: column; }
            .nav-right { justify-content: center; }
            .nav-links { justify-content: center; }
            .about-hero h1 { font-size: 2rem; }
            .intro-grid { flex-direction: column; }
            .timeline::before { left: 20px; }
            .timeline-item { flex-direction: column !important; }
            .timeline-content { width: calc(100% - 50px); margin-left: 50px; }
            .timeline-dot { left: 20px; }
            .factory-grid { grid-template-columns: 1fr; }
            .mvv-grid { gap: 20px; }
        }